Though he had never embraced more than the Jewish ethical code, his fellow-Catholics, whenever they had smarted in person or by proxy under his exactions, spoke of him bitterly as an Irish Jew and an illiterate, and saw divine disapproval of usury made manifest through the person of his idiot son.
There are no more uses of "proxy" in the book.
Show samples from other sources
Her wake was modest but nice—with hundreds of people, her look-alike sister from Omaha bustling by proxy, pouring coffee and Baileys and handing out cookies and telling funny stories about Mo.
Gillian Flynn -- Gone Girl
Using you as a proxy, because the person I really want to harm can’t be harmed.